1911 aficionados. I recently expanded my 1911 collection to include a Dan Wesson Guardian 45 (wow, fantastic pistol, but I'll leave that for another thread). So, looking at the range of Wilson mags for concealed purposes. 8 rounds, low profile. I currently run Chip McCormack and Wilson 47D mags (plus USGI mags for range plinking). The 47DC seems to be what I need, but what about the ETM (500C)? Any concerns about the steel base plate, compared to the usual base plate you see in the 47D mags? i.e. same spring tension, etc? Other good options for a high reliability 1911 mag, 8 round, low profile? Thanks!